I was arguing that this policy would be bad for Steam or other PC marketplace services. It's possible than on a closed system such as the XBox some of the disadvantages of this are alleviated or solved. I still think charging the dev for adding extra content for his game is a very bad idea, though. Team Fortress 2 for the XBox sucks for it, for example. Regular updates is a good model for the user, and it hurts the user to charge for content that would otherwise be free. Alas, I know that helps greatly reduce the number of bugs in the system.